when I change the width of the browser with the mouse (I use responsive design), the second image disappears in some position. But if I refresh the page or change the width, everything restores. Do you have any idea why does the image disappear?

you are making first image size 100%, and so it covers all the browser page..and the second image is pushed down. So it seems to disappears.
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ygssoniAug 28 '12 at 17:36

2

What browser did you test this in? Is there an online example of your problem? Maybe you could create a Fiddle.
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Jasper de VriesAug 29 '12 at 15:02

1

Second @JasperDeVries: As it is this question is very hard to answer. Can you add some more details? Add some html and (links to) sample images so the question contains a short but working example. Explain what you mean by "some position". Add the example in a fiddle as well.
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JeroenSep 2 '12 at 7:18

have the same issue with only one background image
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Idan ShechterJan 14 '13 at 19:16

My problem was solved, I put the background-image below the background size, need to put it above it
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Idan ShechterJan 14 '13 at 19:18